Guys, thanks for the nice comments.
1) This will not be a shelf queen. I made the 3rd Rail ToT a shelf queen mostly because it was better at that than at being a runner: it was detailed and prototypically accurate and impressive to look at, but windows would fall out of one car if I handled it normally when putting it on the track, the 21" cars looked weird going around some of my curves, and the loco run smoothly but the TMCC jackrabbited a bit in conventional (all I run) the sound volume was very low and the smoke unit took ages to warm up and work. So it stayed on the shelf. This loco, by contrast, will run several times a year for a week or more . . .
2) I have two 12 foot shelves for it!!!